Tractor.



c. M. MANLY. TRAGTDB.

APPLICATION FILED MAR-13, 1911.

1,073,102, Patented N0v.11,1913,

3 SHEBTS-SHEET 1.

A ttest: Inventor:

I Z073. Atty G. M. MANLY.

TRACTOR. APPLICATION FIL'ED MAR. 13, 1911,

1,078,102. Patented N0v.1l,1913.

3 QHEETS-SHBET 2.

Attest: y Inventor: f by m 11w MSVMYKN Atty j G. M. MANLY. TRACTOR.APPLICATION FILED MAR.13, 1011.

3 SHEETEPSHEETZI.

A tzest 5 1n ventor j flu by m/1x1161411 "zwl a/ gzwmimg 0 P AttyPatented Nov. 11, 1913.

UNITED-STATES rATE TorEIoE.

.cHAnLEs M. Manny, or BROOKLYN, new YORK.

Specification of Letters Patent. Patented Nov, 11 1913, Applicationfiled March 13, 1911. Serial No. 614,130.

useful Improvements in'Tractors, of which the following is aspecification. 7

My invention relates to power driven tractors and particularly to thatclass of tractors which travel on a single rail.

One object of my invention is to provide" in a tractor of the classdescribed simple and effective means for enabling the driving wheels togrip the track with a force pro portional to the tractive eifortexerted.

A further object of my invention'is to provide additional means forenabling the driving wheels to grip the track, not dependent on thetractive efi'ort.

A further object of my invention is to provide means whereby the powerfrom 'an explosive engine may be transmitted to the drlving wheels ofthe tractor. I

A further object of my invention is, to

provide means whereby the speed of the tractor may be controlledthroughthe power transmitting means.

In the accompanying drawings and an nexed specification I have discloseda preferredembodiment of my invention. It is to'be understood, however,that'my inven tion isnot limitedto the details of construction heredisclosed but covers all such modifications of thesameas fall Within thescope of the appended claims.

In the drawings, Figure- 1 is aside elevation of thesaid'embodimentof'my invention- Fig. 2 is a plan view' of the same.

shown in section. Figs. 4, 5 and views hereinafter referred to.

Referring to the drawings, in which the 6 are detail same' charactersare used to indicate the same parts throughout the several views, 1indicates a track, substantially I-shaped in cross section supported ata convenient dlstance above the ground by means of brackets 2 on parts3, shown 1n Fig. 3 as'arranged along the bank of canal so that thetractor may be employed for towing the canal boats.

which may be of any preferred type and is here shown merely in outline,and-t0 the rear of the engine and in line therewith a hydraulic variablespeed gear 10 is mounted,

the driving shaft 11 thereof being coupled to the engine shaft 12 bymeans of the coupling 13.

2 The hydraulic transmission employed is of the general type disclosedin my U. S.

Patents Nos. 710,485 and 801,097 and of the special type disclosed indetail in my application, Serial No. 525,925 filed Novembenfl,

1909. I have therefore not shown the details-f, of the same in-thedrawings of this applica 7 tion but I'will now describe so much of theconstruction and-operation of the same as is necessary foranunderstand-ing of my present invention.

The forward part Ii of" the hydraulic transmission is the casing of amulti-cylinder variable stroke pump driven by shaft 11 and adapted todeliver oil under-presv surethrough passages inclosed in the middleportionv of the casing to ahydraulic motor so also of the multi-cylindertype inclosed in the rear part 15 of thefcasing. Means are provided tovary the str'okelof the pump pistons so as to vary the amount of fluiddelivered to the motor from a maximum flow ing in one direction throu hzero to a maxi- -mum amount flowing in t e opposite direct-ion so thatthe motor may be drivenin either direction at any speed from the maximumfor which the transmission is designed to zero wit-ha torque increasingin the exact proportion that the speed is decreased. The stroke varyingmeans is operated by a reciprocating rod .16 to which is connected :1-

hand lever 17 fulcrumed at 18 on the casing and working in a notchedua'drant 19, the parts being so proportione that the zero position ofthe pump corresponds with the middle position of the lever,-in which itis wheel Q y-attached to a transverse shaft25 suitably. journaled in theframe at the base of an upstanding arch 26 formed at the rear end oftheframe. Also attached to the" shaft '25 is a flanged supporting wheel 27and a spur gear 28, which gear meshes with an idle car 29 journaled on astud 30 below the swift-25. The gear 29 meshes with a second idleigear31 journaled on a stud 32 under side of the track 1.

mounted in the frame below the stud 30 and this qear 31 meshes with agear'33 freely rotatable on a shaft 34 which is suitably journaled in adepending arch 35 similar to the arch 26. Attached to or formedintegrally with the hub of the gear 33 is a flanged wheeld36 which isadapted to engage the I and 35' are provided with brackets 37 and 33respectively extending beyond the journals ,of the shafts 25 and 34respectively toward the track]. and journaled in the brackets arerollers 39, 40, adapted to engage respectively the upper and lower edgesof the track opposite the flanges of the wheels 27 and 36 to hold thetractor on thetrack.

As shown particularly in Fig. 6 the shaft 34 is forihed withthe middleportion 41, on .which the wheel 36 and gear 33 are mounted,

eccentric to the ends of the shaft journaled in the frame, and attachedto an end of the shaft which projects beyond the frame is an arm 42 towhich is loosely connected the rod 43 of a piston 44 workin in acylinder 45 attached to the side of t e frame, the arrangement of theparts being such that downward movement of the arm eflected by fluidpressure in the cylinder will press the leading from the valve 47 to thecylinder 45,

is a pipe 48. When the valve 47 is adjusted to c'onneot'the pipes 46 and48, it is-obvious that the driving wheels will be forced against thetrack with a force proportional to the pressure of the fluid in the main'oir-' cuit of the hydraulic transmission and this pressure, as will. bereadily seen and as explained in full in'my application above1nentioned, is always proportional to the driving torque of the motorshaft as controlled by the lever 1.7..

The hydraulic transmission disclosed in my above mentioned applicationembodies a leakage pnmpmounted in the casing at 49, and driven from thepump shaft 11.

This leakage pump is shown in cross section in Fig. 4 and consists oftwo intermeshing gears 50 and 51 driven by a gear 52 on the shaft 53 ofthe gear 50, the gear 52 being driven by a gear 53 attached to the pumpshaft 11. The suction side of the leakage pump is connected by a pipe tothe bottom of thecasin in which a reservesupply of oil is store Inoperation the leakage pump forces the oil from the casing through a pipe56 to the low preslhe arches 26- sure side of the fluid circuit, thecapacity of the leakage pump being such that he quantity of oildelivered is always in \'T\'- cess of that necessary to keep the fluidcircuit full of oil, the surplus being returned to the casing through aspring pressed valve whereby a certain degree of back pressure ismaintained in the low pressure passages of the main fluid circuit and inthe pipe Ilu order that this pressure may be used to cause the drivingwheels to grip the track when it is not desired to use the fluidpressure from the main circuit, as for instance when thetractor isrunning without a tow and a slight pressure is all that is needed, Ihave connected the pipe 56 to the three port valve 47 by means of a pipe'57. The valve 47 is shown in cross section in Fig. and is soconstructed that when the handle 47 is set in oneposition the valve body58 covers the port of the pipe 57 and connects the pipe 46 from the mainfluid circuit with the pipe 48 to the cylinder 45 and when the handle isset in another position. the valve body covers the port of'thc pipe 46and connects'the pipe 57 with the pipe 48.

The frame 4 is provided at its rear end with suitable eyes 59 to whichthe tow line 60 of the canal boat 61 or other load to be moved can beattached, here shown for convenience of illustration as attached to theforward eye for backward movement of the tractor. On top of the arch 26a seat (32 for the operator is provided.

The operation of the device will now he described. v

Assuming that the load to be hauled has been attached to the tractor,and that the engine is running and the control lever 1.7 is in its zeroposition, the operator sets the valve 47 to connect the pipe 46 to thepipe 48 of the cylinder 45 and then moves the lever 17 through a verysmall angle in the direction to cause the tractor to move forward.Thismovement of the lever causes the pump to deliver oil at a low ratebut under very high pressure to the motor and consequently to thecylinder 45 through the pipes 46 and 48, thereby starting the tractor ata very slow speed and at the same time causing the driving wheels togrip the track with great force through the me ium of the piston 44, arm42 and eccentric 41. After the boat or other load has been set inmotionthe operator may gradually move his lever away from the zero.position, "until the tractor attains the desired speed. When the tractorrunning light or without a tow, the operator can relieve the parts ofthe friction and strain attendant upon the high tractive pressure byadjusting the valve 47 to connect the pipe 57 from the leakage pumpinstead of the pipe 46 to the cylinder 45, the pressure in the pipe 57being suiticient to hold the tractor against displacement on or from thetrack.

I am aware that electric tractors running on a single rail have beenproposed for towing purposes but such devices, aside from the great costof installation and maintenance are open to the objection that, theycannot be started as graduallyas is requisite for good results and aninternal combustion engine, while overcoming the "difiiculty as regardscost, is entirely inapplicable to such work unless equipped with.

combination of a vehicle frame a power generator, a diving wheel movablerelatively to said frame, means for transmitting the power from thegenerator to the. driving wheel and means operated by powerfrom saidpower generator for moving the driving wheel relatively to saidframe togrip the track which it engages, substantiallyias described. 1 v

2. In a :mono-rail tractor, the combination of a. frame; supportingwheels therefor, means for driving one of said wheels .comprising aninternal combustion engine and a variable speed hydraulic gearinterposed between said engine and driving wheel, and a non-supportingwheel adapted to engage the rail to hold the tractor on the rail,substantially as described.

3. Ina mono-rail tractor, the combination of a frame, supporting wheelstherefor, a non-supporting wheel adapted to engage the rail to. hold thetractor on the rail means for driving said non-supporting wheel, and

means'actuated by said driving means for pressing said non-supportingwheel against said track, substantially as described.

4. In a'traclt supported power vehicle, the combination of a vehicleframe, a power generator supported thereby, a driving wheel, means' 'fortransmitting the power from said power generator to said driving wheel,and means operated by power from said power generator for causing saiddriving wheel to grip its track with a force varying directly as thetractive-eftort exerted, substantially as described.

5. In a mono-rail tractor, the combination of a driving wheel, means tordriving said wheel, a wheel adapted to engage under the rail and meansoperated by said driving means for forcing said last mentioned wheelagainst the rail with a force varying directly as the tractive effortexerted, substantially as described.

6. In a mono-rail. tractor, the combination of a frame, supportingwheels therefor, a wheel adapted to engage" under said rail, means fordriving one of said supporting wheels and said last mentioned wheel, andmeans operated by said driving means for causing the wheels driventhereby to grip the track with a force varying directly asthe tractiveeffort exerted, substantially as described.

7. In a track supported power vehicle, the emnbination of a vehicleframe, a driving wheel movable relative thereto, means for driving saidwheel, and fluid pressure operated means for moving said driving 7 wheeltoward said fraine to cause it to'press against its track, substantiallyas described. s. In a track supported power vehicle,

the combination of a driving wheel, means embodying a variable speedhydraulic gear for driving said wheel, and means operated by the fluidof said hydraulic gear forcausing said driving wheel to grip its track,substantially as described. V

9. In a track supported power vehicle, the

col'nbination of a driving wheel, means em-- bodying a variable speedhydraulicgear for the fluid of said hydraulic gear for causing saiddriving wheel to grip its track With a force varying directly. as thetractive effort exerted, substantially as described.-

10. In a mono-rail tractor, the combination of a frame, supportingwheels therefor, means for driving one of said wheels, a non: supportingwheel adapted to engage the rail, and fluid pressure operated means forcausing said driven supporting wheel and said nonsupporting wheel togrip the rail with a force varying directly as the tractive effortexerted, substantially as described.

11. In a mono-rail tractor, the combination of a frame, supportingwheels therefor, a wheel adapted to engage under said rail, drivingmeans for one of said wheels, fluid pressure operated means for causingsaid driving wheel to grip the rail, and means operated by said drivingmeans for supplying fluid under pressure to said last named means,substantially as described.

12. In. a mono-rail tractor, the. combination of a .trame,supportingwheels therefor,

a wheel adapted to engage under said rail,

means for driving one of said supporting wheels and said last mentionedwheel comprising a variable speed hydraulic gear, and

means operated by the fluid of said gear for,

for driving the wheel, comprising a variable 'means for controlling itscapacity, a by draulic motor, and passages connecting said pump' andmotor, of a fluid pressure operated means for causing said driving wheelto grip 1ts track, and means tor connecting said last named means to thepressure passage of said hydraulic transmigsion whereby the pressure ofsaid gripping means varies directly as the tractive elfort exerted,substantially as described.

15. In a track supported power vehicle, the combination of a drivingwheel, a power generator, a hydraulic transmission between said powergenerator and said driving wheel comprising a pump, a motor driven bythe fluid therefrom, and a leakage pump driven by the power generator,and means adapted to be operated by the fluid pressure generated by saidleakage pump for causing said driving wheel to grip the track,substantially as described.

16. In a track supported power vehicle,.

the combination of a driving wheel, means for driving .said wheelembodying a hydraulic transmission having a plurality of fluid passagesin which thefluid pressure is difi'erent, fluid pressure operated meansfor causing said driving wheel to grip theitrack and means forconnecting said gripping means to either of said fluid passages,substantially as described.

17. In a track supported power vehicle, the combination of a drivingwheel, means March 1911.

for driving said wheel embodying a hydraulic transmission having aplurality of fluid passages in one of which the fluid pressure variesdirectly as the tractive effort of the vehicle and in another of whichthe fluid pressure is substantially constant, of fluid pressure operatedmeans for causing said driving wheel to grip its track and means forconnecting said gripping means with either of said passages,substantially as described.

18. In a mono-rail tractor. the combination of a tame, supporting wheelstherefor, a. wheel adapted to engage under said rail, means for drivingone of said wheels, and means for causing said under wheel to grip thetrack comprising a shaft journaled in the frame and provided with aneccentric portion on which said under wheel is journaled, an armconnected tosaid shaft, a cylinder carried by said frame, a pistonworking in said cylinder and attached to said arm, and means forsupplying fluid under pressure to said cylinder, substantially asdescribed.

19. In a mono-rail tractor, the combination of a frame, supportingwheels therefor, a. wheel adapted to engage under said rail,

means for driving one of said wheels comprising a variable speedhydraulic gear, a

shaft having an eccentric portion supporting said under wheel and armconnected to said shaft, a cylinder carried by the frame, a. pistonattached to said arm and working in said cylinder, and means forsupplying fluid under pressure from said hydraulic transmission to saidcylinder, substantially as described.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing Witnesses, this 11th day of CHARLES M.MANLY'. Witnesses SIGMUND NE\V1\[AN,

ADA I. MILLER.

